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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: RE: Crossover point for Altec 816/JBL E140 & EV DH1012/HR9040 posted by Synthsayer on January 8, 2010 at 07:08:54:
"It explains why I have never gotten the tweeters to sound right either."
Probably not, the 2402 is not a very good tweeter, 5dB down at 15Khz, 10dB down at 20Khz.
http://www.jblpro.com/pub/obsolete/2402.pdf
Most of these rubbed from the factory, and have nasty peaks (not shown on the graphs). On the JBL production line they were tested against a standard, as long as the output was higher than the standard they were acceptable. A consecutive pair might have ±5dB (10dB difference) in the 5Khz~10Khz region. I have been able to shim these and make them much smoother (at a loss of some efficiency), but they have no real high end.
The 2404, 2405 are much better, but still benefit from shimming.
Take a look at this nice little Celestion driver:
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